Not sure if it is just me but it seriously ruins my experience of games when i see the same character multiple times participating in the same match. It doesn’t make sense from an immersion perspective, it is confusing when someone on the enemy team and your team is the same person; i’ve died a few times confusing my enemy with a friend, and in a game that requires split-second decision making, it is a serious hinderance. Dota 2 did well in this regard; disallowing the same character to appear twice in the same match; another game that did this well being Vermintide, where you pick your character beforehand, and you’re only matched with those that are not the character you’re using.
I’m not saying change the current gamemodes (but i certainly wouldn’t say no to it), but i’d like to see a mode where there are no mirror characters in the same game. It just makes more sense that way, and is less confusing overall.